Scraper-edge turner



June 21, 1921. 1,633,329y

J. R. Hours v v SCRAPER EDGE TURNER Filed March 26. 1925 5mm/nto@ Patented June 21, 1927.

UNITED STATES JOHN n. Hours, or MCLEAN, vine-INIA.'

SCRAPER-EDGE TURNER.

Application fued March 2e, 1926. .serial 110.97589.

This invention has for its-object theprovision of a simple and easily manipulated tool whereby the edges of scraper blades may be eh'iciently turned, the tool being intended primarily for use in maintaining an eticient edge upon the blades used in scraping ll-oors. In scraping floors and similar surfaces, it is essential that the edge ofthe scraper blade be turned in order to properly bite into or gripthe floor material, it being` common experience that n a scraper blade which has a sharp cutting edge and would y ordinarily cut intoV and through material to which it is applied will merely slip over a floor, especially a hardwood floor, and in order to obtain the desired results it is necessary that the working edge be slightly deected so as to present a turned cutting edge tothe lioor surface in order to obtain the necessary bite or grip upon the same. -My invention provides 'an' inexpensive means Lwhereby. the edge of the scraper blade may be turned rapidly and as often as necessary in a convenient manner. One form ofthe invention is illustrated in the accompanying drawing, and the/.invention resides in certain novel features which will behereinafter first fully described and then more particularly Vpointed out in the appended claims.

In the drawing: y o

Figure 1 is a vertical longitudinal section oiga device embodying the invention, showing the same arranged for use;

Fig. 2 is a top plan view of the same;

Fig. 3 is a detail section on the line 3-3 of Fig. l;

Fig. 4 is an enlarged detail section particularly showing the manner in which the A turning instrument is supported.

In carrying out the invention, I provide a trame 1 which consists essentially of a base 2 adapted to be secured by screws 3 or the like upon a fixed support, such as a workbench 4, and side plates or standards 5 rising from thel base. The side plates or standards may conveniently be formed integral with the base memberv 2 so that the entire trame may be formed from sheet material of suiicient strength. Mounted in and extending between the upper extremities of the side plates 5 is a rockshatt 6, the intermediate portion of which is attened at diametrica'lly opposite sides, as shown at 7,v and through the said flattened portion is formed a longitudinal slot 8 having its end walls convex, as shownat 9. The slot receives the reduced tongue ortenon 10'at the end ofthe edge turning implement 11, as clearly shown in the drawings. This turning implement 11 is a flat bar having smooth faces, and is very similar in outline to a le or rasp but, unlike a iile or rasp, its opposite. faces are smooth.` Below the rock Vshaft 6 Vand in advance of t-he vertical plane of said forward ofthe pivot and rearwardly therefrom vbeyond the` supporting frame. As shown most clearly in Fig. 3, the holder or clamping plate A13 is dished or curved transversely so` that, when pressure is applied thereto, it will tend to yflatten and thereby bite into the opposed tace of the scraper blade 14 and, consequently, very eiiectually secure the blade against displacement whilebeing acted upon by the edge turning implement 11. The blade is a fiat plate of toolsteel, and, when it is to be treated, is placed upon the holder or clamping plate 13, as illustrated in the drawing. `At a point in rear of the pivot 12, the side edges of the holder or clamping plate 13y are vformedfwith notches, indicatedv at 15, to receive the lugs 16 or upturned ends'of 'abridle or clamping member 17 which is disposed transversely below the holder 13 and carries a thumb screw 18 which is adapted to be turned home against the holder 13, as will be understood upon reference to the drawing. Secured to the lugs or upturned ends 16 is a cross bar 19 which extends across the blade and the holder and bears directly against the upper face of the blade, the pressure exerted by the set .screw 18 being received by this upper cross bar so that the holder 13 will be securely clamped against the blade and the latter, in turn, clamped against the cross bar, the result being that the blade is very securely held'andrcannot be accidentally displaced. The rear edges of the .sideplatesl are arcuate in their lupper portions, as shown at 20, and'along ,these arcuatev portions I provide a series of openings 21 through which maybe selectivelyinserteda stop pin 22, the pin being disposed above the blade 14 and limiting the upward movement of Cil ' holder, as shown clearly in Fig. l-

desired angular relation to the edge of the blade and thereby'turn the same in the degree desired.

It is thought the manner of using the device will be readilyunderstood from the foregoing description, taken in connection with the accompanying drawing. rThe blade is clamped inthe holder in the manner described and shown and theV pin' 22 inserted through the proper openings 21V so as to resist the upward' movement of the rear por t'ion of the holderand the blade, The tenon l "of the edge-turning bar or tool ll is en'- gaged loosely in the slot 8 of the rock shaft 6,a`nd it will be noted that the working edge of thebl'ade will project toward the said tool or bar. The blade' is, 'of course, secured in the holder in' such position that the working edge will project beyond'the front end of Tte e workman will grasp the outer 'freejend of the-bar 1l 4and press downwardly upon the j sainejso that it willbear upon the projecting worlingedge ofthe blade and thereby swing the same into the' position shown in F ig. 1

against thestopl pin 22. The bar ll is rocked back and forth while in contact with the edge of the scraper and the pressure thereby exerted upon the 'edge of the scraper will slightly'turn the same so that it will rapidly acqui-rethe desir'edgripping form. The slot ll is'someWhat longer than the greater dimension of 'the tenon l() so that the-tenen may nieve freely in the slot andthe convex end walls 9 of the 'slot permit the tenon to assu-me any necessary angular relation to the rock shaft.` "The bar vis not attached to the rock shaft but is merely'e'n,f: ,'a`g',ed therewith soitlatthe pressure exerted upon the bar will hold it in'- prepercontact with the scraper blade and itwillnot be necessary for the operator t'oemploy both hands in order to effect such Contact. Moreover', the contact of thebar upon thescraper blade is more uniforni thanif the turning tool was merelyl held manually thereto without any vmechanical sup`p'ort. It will `be noted that the holder and blade are` eccentrieally supported in the fraindythe pivot l2 being close'to the front end Vof the holder but a very considerable distance from the rear lend thereof. Consequently, the tendency of the holder and the bladetherein'to swing to a vertical or substantially vertical position naturally establi'shesthe proper lcontact between the scraper blade and the'bar or toolll -while the pressure eXer't-e'd upon the scraper through the bar 1v1 'will maintain it in the proper angular-position determined by the placement of thev stop pin 22, said stop preventing the pressure of the tool throwing the blade downwardly to a lposition where the tool cannot'act on it. When the edge of the blade has been turned as desired. the workman simply withdraws the bar ll from yits lengagement with the rock shaft .6, whereupon the holder and the blade will swing to a substantially vertical position below the pivot l2, thereby presenting the thumb screw 18 at the front so that it may be very easily reached and manipulated to release vthe blade rin an obvious manner Without' reaching ative 4position to an yoperative position, asulp- Y port for an edge-turning tool carried by said frame above the blade holder, and an edge-V turning tool engaged in said support to bear upon a blade in the holder for 'rocking movement across the' edge ofthe blade, and 'abutment lmeans carried by said frame for adk i justmen't vertically thereof and adapted to extend across the bladel holder 'and 'limit movement thereof from a verticalposition towards a 'horizontalposition.

v2. fnjapparatus for the purpose set forthv comprising 'a supporting frame, a' blade holder pivotally mounted near one eindv in said frame whereby it tends constantly Y'to assume a vertical position,- a rocking'sii'pport mounted i'n the fra-me above the' blade holder, an edge-turning tool loosely engageable with said support to bea-r'upon a blade in the holder and rock back and forth transversely of the'blade uponthe edge o f the saine,-the pressure ofthe tool on the blade swinging the rear end of the holder upwardly, and means adjustable vertically 'of the frame for extending vacross' the blade holder and limiting the upward movement of the rear end of the'blade Vand holder under the pressure eX- ertedupo'n the cutting ledge ofthe blade by the edge turning tool.` f

3. An apparatus for the purposel set forth comprising a supporting Yframe, including vertical standards spaced from each other",ga pivot mounted in said frame between said standards, a'blade holder secured nearone' end 'to said pivot and normallyhanging ver*- tically between Vthe standards, means between llt) the pivotand the opposite fend of the'bladev n holder for securing a blade'to the holder, said means being adjustable into and out of position to secure the blade and havingA an actuating portion extending forwardly from the blade holder when the blade holder is in" yits vertical position, arock shaft mounted in theV frame above and at the rear of said pivot, said standards being provided with vertically spaced alined openings adjacent their rear edges, an abutment rod extending' through selected openings of said standards and adapted to extend across the blade 5 ho-lder and limit its swinging movement rock shaft and arranged to bear upon the front edge of a blade secured to the holder when the holder is swung upwardly out of 1 the vertical position.

In testimony whereof I aiX my signature.

,JoHNR Hours. [L s.] 

